Condensator Installation/Reporting Thread - Page 3 - Fuelly Forums

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Old 08-11-2006, 01:53 PM   #21
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I have goods news and I have bad news:

Bad news...over 327 miles I "used" 11.5 gallons = 28.4 mpg.

Good news...if I avg this with the last tank at 38.84 mpg...I have a 2 tank avg of 33.6 mpg.

If I assume a baseline mpg of 30 mpg without fuel heat...then this is a 12% gain...a little more than with fuel heat.

Good chance that the first tank fill wasn't legit...used one of those vapor recovery pumps.

I'm using a 3 tank avg to validate mods....so next tank should determine the baseline for the Condensator.
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Old 08-11-2006, 01:55 PM   #22
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Are you then going to take it off and test without it?
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Old 08-11-2006, 06:59 PM   #23
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After one more tank I'll probably just call the 3 tank avg the baseline for the Condensator.

Testing weather is about over and I want to remove the fuel heat setup (I guess)...install magnets...manual choke...etc.

Looking closer at my mpg records it seems my best 3 tank avgs with local mixed driving in warm weather are around 31.5 to 32 mpg with fuel heat.

Generally see 33-34 highway loaded on trips though.

Will try to do a "power" test where I will time from 25 mph to 55 mph in 5th gear with the Condensator bypassed vs when working.

** Does anyone know how to calculate a 3 tank avg in a spreadsheet? The sheet needs to recognize the last 3 cells with data. **
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Old 08-26-2006, 12:59 PM   #24
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3 tank avg for the Condensator is in:

tank 1....38.8 mpg < likely a fill where it shut off too soon?

tank 2....28.4 < extra gas added to make up for previous tank?

tank 3....34.9 < close to the avg of the 1st two tanks at 33.6...so I'll call it valid...might be seeing a gradual increase here

Condensator 3 tank avg = 34 mpg...summer 2006

When looking back over the mileage records I do have...it's pretty hard to find a valid baseline...what with summer camping trips and driving it mostly in winter...and testing various things.

What I consider valid 3 tank avgs are...summer driving...local....more or less consistant mixed driving.

EPA city/highway = 29.5 mpg

fuel heat-water inj avg = 31.9 mpg...summer 2004

summer 2005...only driven on camping trip

fuel heat-ozone-acetone avg = 32.1 mpg summer 2006


So what's the % gain for the Condensator?

+15% vs EPA city/highway

+ 6% vs best 3 tank avg with mods

Mods were removed for this test.

Might be seeing a gradual mpg gain?
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Old 08-27-2006, 01:49 PM   #25
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looks like it to me
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Old 09-01-2006, 05:34 AM   #26
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It's possible that the Condensator might be affected by the oil you use?

"Yes oil additives can stop some of these inventions
the stuff they put in oil to make it last longer stops any cracking , seems
it works this way but it is not always consistient the cheap oils have
little additives because they do not care the synthetic have none because
they do not need them Premium oils are loaded so gas saver do not work at
all or as well. Bob Heiderich of CRC that published the Covey manuel had
his tubonator doing great until he ran out of the old oil that he stocked
up on years ago. When he got new oil it did mot work even a new unit that
previously got 40 % gains according to Bob."
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Old 09-18-2006, 05:46 AM   #27
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Got the mileage on the last tank for the Condensator at 30.8 mpg.

This was disappointing...but probably explainable.

For this tank I....

* enabled the EGR...which for some reason with this car seems to reduce mileage by about 10%

* I plugged the air bleed tube on the model A Condensator...but found when putting the model C in that both the jar and the inlet fitting on the top on the model A were slightly loose.

* might have had another short fill last time due to another vapor recovery pump...but this time I kept the rubber flare out away from the filler tube some

* also added 4 oz of Valv Synpower oil additive

So the model C condensator with no air bleed is now installed...EGR is off again. Oil additive in. Will also be checking that the jar is snug now and then....not a big job.
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